Tridgell was also a leader in hacking the TiVo to make it work in Australia, which uses the PAL video format.[2]

In April 2005, Tridgell tried to produce free software (now known as SourcePuller) that interoperated with the BitKeeper source code repository. This was cited as the reason that BitMover revoked a license allowing Linux developers free use of their BitKeeper product.[3]Linus Torvalds, the creator of the Linux kernel, and Tridgell were thus involved in a public debate about the events, in which Tridgell stated that, not having bought or owned BitKeeper – and thus having never agreed to its license – he could not violate it, and was analyzing the protocol ethically, as he had done with Samba. Tridgell's involvement in the project resulted in Torvalds accusing him of playing dirty tricks with BitKeeper.[4] Tridgell claimed his analysis started with simply telneting to a BitKeeper server and typing help.[5]

In 2011 Tridgell got involved with the software development of ArduPilot Mega,[6] an open source Arduino-based UAV controller board, working on an entry for the UAV Challenge Outback Rescue.[7]

Tridgell completed a PhD at the Computer Sciences Laboratory of the Australian National University. His original doctorate work was in the area of speech recognition but was never completed. His submitted dissertation 'Efficient Algorithms for Sorting and Synchronization' was based on his work on the rsync algorithm.[8]

Tridgell started his career working for Efam Resources from 1987 to 1988, designing computer models of financial markets. His work led to a product named The Options Analyst, which he marketed and sold for five years.

From 1988 to 1989, Tridgell worked as a software developer for a company named Sonartech Pty Ltd (now Sonartech Atlas), which developed sonar technologies for Australian submarines. He worked on passive sonar technology.

Between 1989 and 1990, Tridgell was employed at the Research School of Biological Sciences in the Australian National University, making computer models of physical and biological events and environments such as bushfire spread and population dynamics.

From 1991 to 1999, Tridgell held various other positions at the Australian National University, such as UNIX administration, satellite control, and supercomputer research. During this period he was seconded to the Cooperative Research Centre for Advanced Computational Systems, where he headed the PIOuS (Parallel Input/Output System) project—later HiDIOS (High-performance Distributed Input/Output System)—for parallel file systems on the Fujitsu AP1000 and AP+ supercomputers. Tridgell also went on to lecture, first as an associate lecturer, and then as a casual lecturer, in the university's Computer Science division. He remains a Visiting Fellow of the University.

In mid-1999, Tridgell joined the LinuxCare company's office in Canberra as their first Australian employee. He helped to assemble 14 staff for a research and development team known as OzLabs. Linux and open-source companies were quite a new concept at this stage. Tridgell was made a research fellow of LinuxCare in 2000.

Tridgell continued his work with network-attached storage technologies when he joined Quantum Corporation as a Senior Engineer in the Storage Systems Group. His role once again involved developing functionality and efficiency modifications into Samba to enhance Quantum's GuardianOS-powered Snap Server network-attached storage device. One of the features that he added to Samba at this time was support for Microsoft's Active Directory technology, a new authentication system introduced with Microsoft's Windows 2000 Server product range.

In 2004, Tridgell was employed by IBM working remotely for the Almaden Research Center. In January 2005, he joined the OSDL on a one-year fellowship;[9] he then returned to IBM.[10] As of 2015 he no longer works for IBM.[11]

In January 2006, the Free Software Foundation awarded Tridgell its 2005 Award for the Advancement of Free Software, for his work on Samba, the Linux kernel, and rsync. Tridgell was considered to have furthered an important goal of the free software movement since the founding of GNU, analysing ways for free software to interact with widespread proprietary systems to allow people to more easily move away from those systems.